snd: 18.4 -> 18.5
snd: 18.4 -> 18.5

Semi-automatic update generated by https://github.com/ryantm/nixpkgs-update tools.

This update was made based on information from https://repology.org/metapackage/snd/versions.

These checks were done:

- built on NixOS
- /nix/store/yv1d12mfh384087sd9yql3nhj71720lz-snd-18.5/bin/snd passed the binary check.
- 1 of 1 passed binary check by having a zero exit code.
- 0 of 1 passed binary check by having the new version present in output.
- found 18.5 with grep in /nix/store/yv1d12mfh384087sd9yql3nhj71720lz-snd-18.5
- directory tree listing: https://gist.github.com/3cc3f3b2285827a7f116fa28ff12baf7
- du listing: https://gist.github.com/e3639f9f1b7a1e5977ce81065436be06

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